git.oblomov.eu Git - linux-2.6/blob - drivers/acpi/tables/tbinstal.c

   1 /******************************************************************************
   2  *
   3  * Module Name: tbinstal - ACPI table installation and removal
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2008, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include <acpi/acpi.h>
  45 #include <acpi/acnamesp.h>
  46 #include <acpi/actables.h>
  47
  48 #define _COMPONENT          ACPI_TABLES
  49 ACPI_MODULE_NAME("tbinstal")
  50
  51 /******************************************************************************
  52  *
  53  * FUNCTION:    acpi_tb_verify_table
  54  *
  55  * PARAMETERS:  table_desc          - table
  56  *
  57  * RETURN:      Status
  58  *
  59  * DESCRIPTION: this function is called to verify and map table
  60  *
  61  *****************************************************************************/
  62 acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
  63 {
  64         acpi_status status = AE_OK;
  65
  66         ACPI_FUNCTION_TRACE(tb_verify_table);
  67
  68         /* Map the table if necessary */
  69
  70         if (!table_desc->pointer) {
  71                 if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
  72                     ACPI_TABLE_ORIGIN_MAPPED) {
  73                         table_desc->pointer =
  74                             acpi_os_map_memory(table_desc->address,
  75                                                table_desc->length);
  76                 }
  77                 if (!table_desc->pointer) {
  78                         return_ACPI_STATUS(AE_NO_MEMORY);
  79                 }
  80         }
  81
  82         /* FACS is the odd table, has no standard ACPI header and no checksum */
  83
  84         if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) {
  85
  86                 /* Always calculate checksum, ignore bad checksum if requested */
  87
  88                 status =
  89                     acpi_tb_verify_checksum(table_desc->pointer,
  90                                             table_desc->length);
  91         }
  92
  93         return_ACPI_STATUS(status);
  94 }
  95
  96 /*******************************************************************************
  97  *
  98  * FUNCTION:    acpi_tb_add_table
  99  *
 100  * PARAMETERS:  table_desc          - Table descriptor
 101  *              table_index         - Where the table index is returned
 102  *
 103  * RETURN:      Status
 104  *
 105  * DESCRIPTION: This function is called to add the ACPI table
 106  *
 107  ******************************************************************************/
 108
 109 acpi_status
 110 acpi_tb_add_table(struct acpi_table_desc *table_desc,
 111                   acpi_native_uint * table_index)
 112 {
 113         acpi_native_uint i;
 114         acpi_native_uint length;
 115         acpi_status status = AE_OK;
 116
 117         ACPI_FUNCTION_TRACE(tb_add_table);
 118
 119         if (!table_desc->pointer) {
 120                 status = acpi_tb_verify_table(table_desc);
 121                 if (ACPI_FAILURE(status) || !table_desc->pointer) {
 122                         return_ACPI_STATUS(status);
 123                 }
 124         }
 125
 126         /*
 127          * Originally, we checked the table signature for "SSDT" or "PSDT" here.
 128          * Next, we added support for OEMx tables, signature "OEM".
 129          * Valid tables were encountered with a null signature, so we've just
 130          * given up on validating the signature, since it seems to be a waste
 131          * of code. The original code was removed (05/2008).
 132          */
 133
 134         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 135
 136         /* Check if table is already registered */
 137
 138         for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 139                 if (!acpi_gbl_root_table_list.tables[i].pointer) {
 140                         status =
 141                             acpi_tb_verify_table(&acpi_gbl_root_table_list.
 142                                                  tables[i]);
 143                         if (ACPI_FAILURE(status)
 144                             || !acpi_gbl_root_table_list.tables[i].pointer) {
 145                                 continue;
 146                         }
 147                 }
 148
 149                 length = ACPI_MIN(table_desc->length,
 150                                   acpi_gbl_root_table_list.tables[i].length);
 151                 if (ACPI_MEMCMP(table_desc->pointer,
 152                                 acpi_gbl_root_table_list.tables[i].pointer,
 153                                 length)) {
 154                         continue;
 155                 }
 156
 157                 /* Table is already registered */
 158
 159                 acpi_tb_delete_table(table_desc);
 160                 *table_index = i;
 161                 status = AE_ALREADY_EXISTS;
 162                 goto release;
 163         }
 164
 165         /*
 166          * Add the table to the global table list
 167          */
 168         status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
 169                                      table_desc->length, table_desc->flags,
 170                                      table_index);
 171         if (ACPI_FAILURE(status)) {
 172                 goto release;
 173         }
 174
 175         acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
 176
 177       release:
 178         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 179         return_ACPI_STATUS(status);
 180 }
 181
 182 /*******************************************************************************
 183  *
 184  * FUNCTION:    acpi_tb_resize_root_table_list
 185  *
 186  * PARAMETERS:  None
 187  *
 188  * RETURN:      Status
 189  *
 190  * DESCRIPTION: Expand the size of global table array
 191  *
 192  ******************************************************************************/
 193
 194 acpi_status acpi_tb_resize_root_table_list(void)
 195 {
 196         struct acpi_table_desc *tables;
 197
 198         ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
 199
 200         /* allow_resize flag is a parameter to acpi_initialize_tables */
 201
 202         if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
 203                 ACPI_ERROR((AE_INFO,
 204                             "Resize of Root Table Array is not allowed"));
 205                 return_ACPI_STATUS(AE_SUPPORT);
 206         }
 207
 208         /* Increase the Table Array size */
 209
 210         tables = ACPI_ALLOCATE_ZEROED((acpi_gbl_root_table_list.size +
 211                                        ACPI_ROOT_TABLE_SIZE_INCREMENT)
 212                                       * sizeof(struct acpi_table_desc));
 213         if (!tables) {
 214                 ACPI_ERROR((AE_INFO,
 215                             "Could not allocate new root table array"));
 216                 return_ACPI_STATUS(AE_NO_MEMORY);
 217         }
 218
 219         /* Copy and free the previous table array */
 220
 221         if (acpi_gbl_root_table_list.tables) {
 222                 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
 223                             acpi_gbl_root_table_list.size *
 224                             sizeof(struct acpi_table_desc));
 225
 226                 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 227                         ACPI_FREE(acpi_gbl_root_table_list.tables);
 228                 }
 229         }
 230
 231         acpi_gbl_root_table_list.tables = tables;
 232         acpi_gbl_root_table_list.size += ACPI_ROOT_TABLE_SIZE_INCREMENT;
 233         acpi_gbl_root_table_list.flags |= (u8) ACPI_ROOT_ORIGIN_ALLOCATED;
 234
 235         return_ACPI_STATUS(AE_OK);
 236 }
 237
 238 /*******************************************************************************
 239  *
 240  * FUNCTION:    acpi_tb_store_table
 241  *
 242  * PARAMETERS:  Address             - Table address
 243  *              Table               - Table header
 244  *              Length              - Table length
 245  *              Flags               - flags
 246  *
 247  * RETURN:      Status and table index.
 248  *
 249  * DESCRIPTION: Add an ACPI table to the global table list
 250  *
 251  ******************************************************************************/
 252
 253 acpi_status
 254 acpi_tb_store_table(acpi_physical_address address,
 255                     struct acpi_table_header *table,
 256                     u32 length, u8 flags, acpi_native_uint * table_index)
 257 {
 258         acpi_status status = AE_OK;
 259
 260         /* Ensure that there is room for the table in the Root Table List */
 261
 262         if (acpi_gbl_root_table_list.count >= acpi_gbl_root_table_list.size) {
 263                 status = acpi_tb_resize_root_table_list();
 264                 if (ACPI_FAILURE(status)) {
 265                         return (status);
 266                 }
 267         }
 268
 269         /* Initialize added table */
 270
 271         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 272             address = address;
 273         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 274             pointer = table;
 275         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].length =
 276             length;
 277         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 278             owner_id = 0;
 279         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].flags =
 280             flags;
 281
 282         ACPI_MOVE_32_TO_32(&
 283                            (acpi_gbl_root_table_list.
 284                             tables[acpi_gbl_root_table_list.count].signature),
 285                            table->signature);
 286
 287         *table_index = acpi_gbl_root_table_list.count;
 288         acpi_gbl_root_table_list.count++;
 289         return (status);
 290 }
 291
 292 /*******************************************************************************
 293  *
 294  * FUNCTION:    acpi_tb_delete_table
 295  *
 296  * PARAMETERS:  table_index         - Table index
 297  *
 298  * RETURN:      None
 299  *
 300  * DESCRIPTION: Delete one internal ACPI table
 301  *
 302  ******************************************************************************/
 303
 304 void acpi_tb_delete_table(struct acpi_table_desc *table_desc)
 305 {
 306         /* Table must be mapped or allocated */
 307         if (!table_desc->pointer) {
 308                 return;
 309         }
 310         switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
 311         case ACPI_TABLE_ORIGIN_MAPPED:
 312                 acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
 313                 break;
 314         case ACPI_TABLE_ORIGIN_ALLOCATED:
 315                 ACPI_FREE(table_desc->pointer);
 316                 break;
 317         default:;
 318         }
 319
 320         table_desc->pointer = NULL;
 321 }
 322
 323 /*******************************************************************************
 324  *
 325  * FUNCTION:    acpi_tb_terminate
 326  *
 327  * PARAMETERS:  None
 328  *
 329  * RETURN:      None
 330  *
 331  * DESCRIPTION: Delete all internal ACPI tables
 332  *
 333  ******************************************************************************/
 334
 335 void acpi_tb_terminate(void)
 336 {
 337         acpi_native_uint i;
 338
 339         ACPI_FUNCTION_TRACE(tb_terminate);
 340
 341         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 342
 343         /* Delete the individual tables */
 344
 345         for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 346                 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
 347         }
 348
 349         /*
 350          * Delete the root table array if allocated locally. Array cannot be
 351          * mapped, so we don't need to check for that flag.
 352          */
 353         if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 354                 ACPI_FREE(acpi_gbl_root_table_list.tables);
 355         }
 356
 357         acpi_gbl_root_table_list.tables = NULL;
 358         acpi_gbl_root_table_list.flags = 0;
 359         acpi_gbl_root_table_list.count = 0;
 360
 361         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
 362         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 363 }
 364
 365 /*******************************************************************************
 366  *
 367  * FUNCTION:    acpi_tb_delete_namespace_by_owner
 368  *
 369  * PARAMETERS:  table_index         - Table index
 370  *
 371  * RETURN:      None
 372  *
 373  * DESCRIPTION: Delete all namespace objects created when this table was loaded.
 374  *
 375  ******************************************************************************/
 376
 377 void acpi_tb_delete_namespace_by_owner(acpi_native_uint table_index)
 378 {
 379         acpi_owner_id owner_id;
 380
 381         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 382         if (table_index < acpi_gbl_root_table_list.count) {
 383                 owner_id =
 384                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 385         } else {
 386                 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 387                 return;
 388         }
 389
 390         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 391         acpi_ns_delete_namespace_by_owner(owner_id);
 392 }
 393
 394 /*******************************************************************************
 395  *
 396  * FUNCTION:    acpi_tb_allocate_owner_id
 397  *
 398  * PARAMETERS:  table_index         - Table index
 399  *
 400  * RETURN:      Status
 401  *
 402  * DESCRIPTION: Allocates owner_id in table_desc
 403  *
 404  ******************************************************************************/
 405
 406 acpi_status acpi_tb_allocate_owner_id(acpi_native_uint table_index)
 407 {
 408         acpi_status status = AE_BAD_PARAMETER;
 409
 410         ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
 411
 412         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 413         if (table_index < acpi_gbl_root_table_list.count) {
 414                 status = acpi_ut_allocate_owner_id
 415                     (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
 416         }
 417
 418         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 419         return_ACPI_STATUS(status);
 420 }
 421
 422 /*******************************************************************************
 423  *
 424  * FUNCTION:    acpi_tb_release_owner_id
 425  *
 426  * PARAMETERS:  table_index         - Table index
 427  *
 428  * RETURN:      Status
 429  *
 430  * DESCRIPTION: Releases owner_id in table_desc
 431  *
 432  ******************************************************************************/
 433
 434 acpi_status acpi_tb_release_owner_id(acpi_native_uint table_index)
 435 {
 436         acpi_status status = AE_BAD_PARAMETER;
 437
 438         ACPI_FUNCTION_TRACE(tb_release_owner_id);
 439
 440         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 441         if (table_index < acpi_gbl_root_table_list.count) {
 442                 acpi_ut_release_owner_id(&
 443                                          (acpi_gbl_root_table_list.
 444                                           tables[table_index].owner_id));
 445                 status = AE_OK;
 446         }
 447
 448         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 449         return_ACPI_STATUS(status);
 450 }
 451
 452 /*******************************************************************************
 453  *
 454  * FUNCTION:    acpi_tb_get_owner_id
 455  *
 456  * PARAMETERS:  table_index         - Table index
 457  *              owner_id            - Where the table owner_id is returned
 458  *
 459  * RETURN:      Status
 460  *
 461  * DESCRIPTION: returns owner_id for the ACPI table
 462  *
 463  ******************************************************************************/
 464
 465 acpi_status
 466 acpi_tb_get_owner_id(acpi_native_uint table_index, acpi_owner_id * owner_id)
 467 {
 468         acpi_status status = AE_BAD_PARAMETER;
 469
 470         ACPI_FUNCTION_TRACE(tb_get_owner_id);
 471
 472         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 473         if (table_index < acpi_gbl_root_table_list.count) {
 474                 *owner_id =
 475                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 476                 status = AE_OK;
 477         }
 478
 479         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 480         return_ACPI_STATUS(status);
 481 }
 482
 483 /*******************************************************************************
 484  *
 485  * FUNCTION:    acpi_tb_is_table_loaded
 486  *
 487  * PARAMETERS:  table_index         - Table index
 488  *
 489  * RETURN:      Table Loaded Flag
 490  *
 491  ******************************************************************************/
 492
 493 u8 acpi_tb_is_table_loaded(acpi_native_uint table_index)
 494 {
 495         u8 is_loaded = FALSE;
 496
 497         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 498         if (table_index < acpi_gbl_root_table_list.count) {
 499                 is_loaded = (u8)
 500                     (acpi_gbl_root_table_list.tables[table_index].
 501                      flags & ACPI_TABLE_IS_LOADED);
 502         }
 503
 504         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 505         return (is_loaded);
 506 }
 507
 508 /*******************************************************************************
 509  *
 510  * FUNCTION:    acpi_tb_set_table_loaded_flag
 511  *
 512  * PARAMETERS:  table_index         - Table index
 513  *              is_loaded           - TRUE if table is loaded, FALSE otherwise
 514  *
 515  * RETURN:      None
 516  *
 517  * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
 518  *
 519  ******************************************************************************/
 520
 521 void acpi_tb_set_table_loaded_flag(acpi_native_uint table_index, u8 is_loaded)
 522 {
 523
 524         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 525         if (table_index < acpi_gbl_root_table_list.count) {
 526                 if (is_loaded) {
 527                         acpi_gbl_root_table_list.tables[table_index].flags |=
 528                             ACPI_TABLE_IS_LOADED;
 529                 } else {
 530                         acpi_gbl_root_table_list.tables[table_index].flags &=
 531                             ~ACPI_TABLE_IS_LOADED;
 532                 }
 533         }
 534
 535         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 536 }